barbarious
ˈbɑr.bəˈri.əs
Definitions
1. adjective
lacking refinement or culture; savage
“The barbarious treatment of the prisoners was widely condemned.”
2. adverb
in a barbarous manner
“The tribe fought barbariously, leaving many dead.”
3. noun
a quality of being savage or uncivilized
“The barbariousness of the attack shocked the world.”